Model Price Index
Updated 2026-09-15 · Changelog

Claude Mythos 5.1

Anthropic

Same underlying model as Claude Fable 5.1 without the additional safety measures, available only to approved organizations

$10.00

Input

$50.00

Output

per 1M tokens

Ratesper 1M tokens

Input$10.00
Output$50.00
Cache Read$0.25
Cache Write$12.50

Estimate Your Monthly Cost

A request with input and output tokens, requests / month at a % cache hit rate $1,650/mo

Compare all models at this workload →

Excludes cache writes and batch discounts.

Specifications

API Model IDclaude-mythos-5-1
Context Window1M tokens
Max Output128K tokens
Modalitiestext · image
Capabilitiestool-use · streaming · json-mode · vision · code · extended-thinking

More Anthropic Text / Chat Models

Claude Fable 5.1 · Claude Fable 5 · Claude Mythos 5 · Claude Opus 5 · Claude Opus 4.8 · Claude Opus 4.7 · Claude Opus 4.6 · Claude Opus 4.5 ·